Time-domain characterization of ultrashort pulses is essential for studying interactions between light and matter.Here,we propose and demonstrate an all-optical pulse sampling technique based on reflected four-wave mi...Time-domain characterization of ultrashort pulses is essential for studying interactions between light and matter.Here,we propose and demonstrate an all-optical pulse sampling technique based on reflected four-wave mixing with perturbation on a solid surface.In this method,a weak perturbation pulse perturbs the four-wave mixing signal generated by a strong fundamental pulse.The modulation signal of the four-wave mixing,which is detected in the reflection geometry to ensure a perfect phase-matching condition,directly reflects the temporal profile of the perturbation pulse.We successfully characterized multi-cycle and few-cycle pulses using this method.The reliability of our approach was verified by comparing it to the widely employed frequency-resolved optical gating method.This technique provides a simple and robust method for characterizing ultrashort laser pulses.展开更多
基金supported by the National Key R&D Program of China(No.2022YFE0111500)the National Natural Science Foundation of China(NSFC)(Nos.62175256,12104501,92050107 and 92250303)+5 种基金the Natural Science Basic Research Program of Shaanxi(No.2019JCW-03)the Science and Technology Program of Xi’an(No.202005YK01)the Young Scientist Basic Research Program of the Chinese Academy of Sciences(No.YSBR-091)the Key Deployment Research Program of XIOPM(No.S19-020-III)the Innovation Team in Shaanxi Province(No.J21-029-III)the Youth Innovation Promotion Association XIOPM-CAS(No.WCH2021002)。
文摘Time-domain characterization of ultrashort pulses is essential for studying interactions between light and matter.Here,we propose and demonstrate an all-optical pulse sampling technique based on reflected four-wave mixing with perturbation on a solid surface.In this method,a weak perturbation pulse perturbs the four-wave mixing signal generated by a strong fundamental pulse.The modulation signal of the four-wave mixing,which is detected in the reflection geometry to ensure a perfect phase-matching condition,directly reflects the temporal profile of the perturbation pulse.We successfully characterized multi-cycle and few-cycle pulses using this method.The reliability of our approach was verified by comparing it to the widely employed frequency-resolved optical gating method.This technique provides a simple and robust method for characterizing ultrashort laser pulses.
